The structure, working principle and application of lithium iron phosphate battery

Lithium iron phosphate battery structure and working principle Lithium iron phosphate battery is used as the positive electrode of the battery. It is connected with the positive electrode of the battery by aluminum foil, with a polymer separator in the middle, which separates the positive electrode from the negative electrode, but lithium ion Li can pass through and electrons e -Can't pass. On the right is the negative electrode of the battery composed of carbon (graphite), which is connected to the negative electrode of the battery by copper foil. Between the upper and lower ends of the battery is the electrolyte of the battery, and the battery is hermetically sealed by a metal casing. When a lithium iron phosphate battery is charged, the lithium ion Li in the positive electrode migrates to the negative electrode through the polymer separator; during the discharge process, the lithium ion Li in the negative electrode migrates to the positive electrode through the separator. Lithium-ion batteries are named after lithium ions move back and forth during charging and discharging. What I want to explain here is that there are some differences in various performance parameters of lithium iron phosphate power lithium batteries produced by different factories; in addition, some battery properties are not listed, such as battery internal resistance, self-discharge rate, charge and discharge temperature, etc. . Uses of lithium iron phosphate batteries Lithium iron phosphate batteries are lithium-ion secondary batteries. An important use is to be used as power lithium batteries, which have great advantages over NI-MH and Ni-Cd batteries. The charging and discharging efficiency of lithium iron phosphate batteries is relatively high, between 85% and 90%. The lead-acid battery is about 80%. Lithium iron phosphate batteries have important safety applications for electric vehicles. In recent years, the rapid development of electric vehicles has driven the development of power lithium iron phosphate batteries. As the power source of electric vehicles, the performance of the battery is not only related to the length of the vehicle's driving range, but also related to the safety and reliability of the product. It can be said that the development of power lithium batteries determines the future of pure electric vehicles. If the high-safety lithium iron phosphate battery is used in an extended-range electric vehicle, not only can the safety of the vehicle be improved, but the specific energy and specific power are fully sufficient, and the service life is long. In addition, my country is rich in lithium resources, and there is no problem of restricted cobalt and nickel resources. Therefore, my country should focus on lithium iron phosphate batteries to support the marketization of extended-range electric vehicles. It can effectively eliminate the five major concerns of pure electric vehicles such as mileage, safety, price, charging, and follow-up batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages and disadvantages of polymer lithium ion batteries?